Improvement in metallic cartridges



DEPEW L SLATCHER.

Cartridge.

Patented Dec. 7, 1869.

NA PETERS. Plom-Llmogmpher, wnxhingwm D. C,

UNITED STATES PATENT OFFICE.

ABRAHAM C. DEPEW AND J OHLT SLATOHER, OF BBIDGEPORBOONNEOTIOUT.

IMPROVEMENT IN METALLIC CARTRIDGES.

Specification form/ing part of Letters Patent No. 97 ,615, dated December` 7, 1869.

To all whom it may concern Be it known that we, ABRAHAM G. DEPEW and JOHN SLATCHER, of Bridgeport, in the county of Faireld and State of Connecticut, haveinvented anew and valuablelniprovement in Metallic-0ase Cartridges; and we do here by declare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures ot' reference marked thereon.

Figure l ot the drawings is a longitudinal central section of our invention. Fig. 2 is a crosssection of the same taken through the line X X near the lbase of the chamber'. Fig. 3 is a rear view, with cap removed. Fig. 4 is a centralV longitudinal section ofthe nipple.

Our invention relates to cartridges for breech-loadin g fire-arms; and consists, mainly, in the construction and novel arrangement of devices whereby the metallic case is m ade very strong and firm, and capable of being used many times without detriment to its shape or efficiency.

The case is designed for a centenire cartridge, and may be thus described rlhe letter B designates the inner case or lining, made ot' copper, bronze, or brass, and, at the base, three or four times as thick as the outer cylinder or shell, tapering graduallyv until at its front edge it becomes of about the same thickness. Thus, while the exterior case is a true cylinder, the bore or chamber of the cartridge is slightly conical. The outer cylinder is lettered on the drawings O, and may be of the same material as the lining. The lining B has a rounded or concave base, with a central circular opening for the admission of the end of the nipple a. It extends forward, forming a lining to the whole of that portion of the cartridge in which the charge is placed, but stopping short of the extreme forward edge ofthe exterior cylinder C by the distance of one-eighth of an inch or less. The forward edge of the interior lining B thus forms a shoulder forv the base of the bullet to rest upon, while the thin projecting end of the outer cylinder serves to embrace the base of 'the bullet and secure it in position. The exterior casing C also extends beyond the rounded base of the 1ining B to the rear, and abuts against the ilange of the steel base A of the cartridge. The steel base A is made concave in front, and lits accurately the rounded base ot' the lining B, illing the cavity formed by the projection of the rear end of the exterior case O. The base is formed with a stout flange, against which abuts the rear end of the outer case. For the reception of the nipple a an opening is formed through the steel base A, being a prolongation of the opening in the base of the lining B. At a distance a little more than one-eighth of an inch from the base of' the cartridge this opening becomes wider, a shoulder, z, being formed, upon which rests the shoulder ot the nipple a. The nipple a is acylindrical tube for the irst two-thirds of its length, then expands exteriorly, forming a shoulder, from which it slopes back in the form of a truncated cone, the solid imperforate end of which serves as an anvil for the explosion of the cap b. The fire of the cap communicates with the interior of the nipple by means of three small openings c c, equidistant from each other through the beveled sides of the truncated cone. The cap b has a rounded base filled with percussionpowder, and a short liange, the exterior surface ot' which accurately tits the opening in the base ol' the cartridge.

What we claim as our invention, and desire to secure by Letters Patent, is-

'lhe metallic cartridge-case herein described, having an interior case or lining, B, with conical chamber B, and concave base e, and a thin external shell, C, secured to a steel base, A, with concave front perforated centrally, and having a shoulder, z, to receive and support a removable nipple, a, having three ring apertures, constructed and arranged to operate as specilied.

In testimony that we claim the above, We have hereunto subscribed our names in the presence of two witnesses.

ABRAHAM C. DEPEW-` JOHN SLATOHER. Witnesses:

DAVID B. LooKWooD, ROBERT E. DE FOREST, FLOYD G. SHEPAED, ALBERT C. STEVENS. 

